How much can a landlord charge for a security deposit?

The basic shape of the rule

A security deposit cap is almost always expressed as a multiple of the monthly rent rather than a dollar figure. One month's rent is the most common limit; one and a half and two months are also widespread. A handful of states set no statutory cap at all, which means the market sets it.

Because the cap is a multiple, it moves with your rent. A two-month cap in an expensive city is a large sum, and the same rule in a cheap one is not. This is also why a deposit that felt normal in a previous tenancy can be unlawful in a new state at the same dollar amount.

The exceptions are where it gets complicated

Nearly every state that sets a cap also carves holes in it. These are the patterns that recur, and any one of them can legitimately push a deposit above the headline number.

Pets

Many states allow an additional pet deposit on top of the ordinary cap, and some treat it as a non-refundable fee rather than a deposit at all. The distinction matters enormously at move-out: a deposit has to be accounted for and returned, a fee does not. Assistance animals are usually treated differently again and are frequently exempt from pet charges entirely.

Furnished units

Some states permit a higher deposit for a furnished let. Others used to and have since removed the distinction, which is a good example of why a figure remembered from a few years ago is unreliable.

Small landlords

A growing number of states exempt owners below a certain size — a natural person owning no more than a couple of properties, say — from the tighter cap that applies to everyone else. These exemptions tend to be narrowly drawn and often exclude particular tenant groups, service members being the common one.

Last month's rent

Where a landlord collects last month's rent up front, states differ on whether that counts toward the deposit cap, is regulated separately, or is outside the rules entirely. It is one of the most common ways a total move-in cost exceeds what the cap appears to allow while remaining lawful.

Alterations and risk

Some statutes permit additional amounts for changes the tenant asked for, or for activities that increase the risk of damage. These clauses are usually narrow, but they exist.

Two worked examples from the dataset

These two are recorded in structured form and can be quoted directly. Each links to its full page and its statute.

• Connecticut: Max 2 months rent; 1 month if tenant is 62 or older.
• New Jersey: Capped at 1.5 months rent; annual increases limited to 10 percent of the current deposit
• New York: Capped at one month's rent, with exceptions for seasonal-use units and owner-occupied cooperative apartments.

What actually counts toward the cap

The number that shocks people at move-in is rarely the deposit on its own. It is the deposit plus everything else demanded in the same week, and only some of that is governed by the cap.

• The security deposit. Refundable, has to be accounted for at the end, and is what the cap is about.
• First month's rent. Rent, not a deposit. Outside the cap everywhere.
• Last month's rent, paid up front. The contested one. Some states fold it into the deposit cap, some regulate it separately, some leave it alone. This single question is the most common reason a lawful move-in cost looks like it exceeds the limit.
• Non-refundable fees. Cleaning fees, admin fees, move-in fees. Some states prohibit calling anything non-refundable and treat every such charge as part of the deposit — which, if true where you live, means you may be owed it back. Others allow them outright provided they are disclosed.
• Application and screening fees. Usually capped separately, often at the actual cost of running the check, and frequently required to be refunded if the check is not run.

Two practical consequences. Add up only the refundable amounts before concluding you were charged over the cap. And keep the paperwork that names each charge — whether a payment was a "deposit" or a "fee" is decided by what it does, not only by what the lease called it, and the lease wording is where that argument starts.

If you think you were overcharged

A deposit above the statutory cap is not usually void — the ordinary remedy is that the excess must be returned, sometimes with a penalty attached. Whether that happens automatically or only if you ask varies, and so does the deadline for asking.

The practical route is the same as any other deposit dispute: establish the rule from the statute on your state's page, put the request in writing with the figure and the citation, and keep the correspondence. Thedeposit recovery guide covers that sequence in full.

Caps and interest are separate questions

A state can cap deposits tightly and require no interest, or set no cap and require interest — the two rules are unrelated and live in different parts of most statutes. If you want to know whether interest is owed on what you paid, that is thecalculator on your state's page, and it is a different question from whether the amount was lawful in the first place.